As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU BLEED VALVE CYCLED CLOSED AND REMAINED IN THE COLSED POSITION WHEN AC PACKS WERE TURNED OFF ON ENGINE START CHECKLIST, APU BLEED POWER CONTROL C/B OPENED. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE RESET APU BLEED CONTROL C/B SATIS. IAW AMM 49-53-01 AIRCRAFT REMAINS ETOPS 180. AIRCRAFT RETURNED TI SERVICE.